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Temperature Study of Sub-Micrometric ICs by Scanning Thermal Microscopy

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10 Author(s)
Gomes, S. ; Univ. Claude Bernard Lyon 1, Villeurbanne ; Chapuis, P.-O. ; Nepveu, F. ; Trannoy, N.
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Surface temperature measurements were performed with a scanning thermal microscope mounted with a thermoresistive wire probe of micrometric size. A CMOS device was designed with arrays of resistive lines 0.35 mum in width. The array periods are 0.8 mum and 10 mum to study the spatial resolution of the SThM. Integrated circuits (ICs) with passivation layers of micrometric and nanometric thicknesses were tested. To enhance signal-to-noise ratio, the resistive lines were heated with an ac current. The passivation layer of nanometric thickness allows us to distinguish the lines when the array period is 10 mum. The results raise the difficulties of the SThM measurement due to the design and the topography of ICs on one hand and the size of the thermal probe on the other hand.

Published in:

Components and Packaging Technologies, IEEE Transactions on  (Volume:30 ,  Issue: 3 )

Date of Publication:

Sept. 2007

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